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which cross will produce all male-sterile progeny?
(In each genotype, the mitochondrial genotype is designated as ms or mf and the homozygous nuclear genotypes as RR or rr. The female parent in each cross is listed first).

A) ms; rr x mf; RR
B) ms; RR x mf; rr rr
C) ms; rr; x ms; RR
D) ms; rr x mf; rr
E) ms; rr x ms

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